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23/10/2021 6:42 pm
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Find the initial velocity of a car which is stopped in 10 seconds by applying brakes. The retardation due to brakes is 2.5 m/s2.
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23/10/2021 6:43 pm
Initial velocity, u = ?
Final velocity, v = 0m/s (car is stopped)
Retardation, a = -2.5 m/s2
Time, t = 10s
v = u + at
0 = u +(-2.5) x 10
u = 25 m/s